Veneer-taping machine



Aug. 9 1927.

1,638,664 H. G. GREENFIELD VENEER TAPI NG MACHINE Filed Oct. 1l, 1926 2sheets-sheet 1 fg. E

wImm" Aug. 9 l1927. l H. G. GREENFIELD VENEER TAPING MACHINE Filed oct.11. 192e 2 Sheets-Sheet` 2 atroz ne* Patented Aug. 9, 1927.

y Uri'y HUGH G. GREENFIELD, OF TAGOIVIA, WASHINGTON, ASSIGNOR OFONE-HALF TO VARIETY MACHINERY COMPANY, F TACOMA, WASHINGTON, ACOBPORATIONOF y WAsHINGJroN. Y Y

vENnnR-TAriNG MACHINE@ Application med october i1, i926.- seriaiivo.'14o,774.

This invention relates to-machiies (for ap plyin@ a strip of paper tapeto te e ges o venecia' sheets and has for its objects, first, to providemeans whereby the length of time Y elapsed between the wettingV of theguinmed surface of the paper tape and its application to the sheet/ofveneeris substantially con- I' tape; and

stant independent of the speed of feed of the veneer through themachine; second, to provide means whereby the said elapsed time may beadjusted to suit varying conditions of atmospheric humidity andtemperature, or for varying conditions of, or lrinds 0r brands ofrtaper; third, to provide means whereby the speed of the yveneer fedthrough the machine may be easily and quickly changed, thereby enablingthe operator to run all lengths and grades of veneer through the machinewithout having to stop the machine to shift his belt from one pulley toanother and without having to manually change thepathof the tape fromthe water bath to the veneer in order to alter the length of exposed wetfourth, to provide means whereby the wet tape may be guided to one sideof the center of the feed mechanism thereby adapting, it for taping Ythe edges of sheets of veneer.

i I attain these and: other objects bythe devices, mechanisms, andarrangements illus-t` trated in the accompanying drawings, in whichy,

Fig. l is a side elevation o f my improved machine; Fig. 2 is a planview of the tape guiding means'for taping the ends Ofsheets of veneer;Fig.I 3 is a horizontal section on the line 3--3 in Fig. 4; ligj lis afront elevation of `a portion ofthe tapingmachine and Fig. 5 is asection ofthe variable speed drive of the Vtaping machine, showing thebelt shifting means mounted thereon.

. Similar numerals of reference refer to similar' parts throughout theseveral views.

t is well known practice, in workin-g with very thin sheets of veneer,to apply a strip of paper tape to the edges of the sheet, or to applyasimilar strip of tape to both adjacent edges of two sheets of veneer.machine is ,adapted to` applyV the tape in either way by applying orremovinga part thereof to cause'the tape to be runeither to .one side ofthe center or yon the center, as i the case may be.` The speed at whichthe Asheets of veneer may fedy through the This machine depends partlyontheir size, their dryness and their distortion. .It hasbeencustomary'` to change the vspeed ofthe feed f by stoppingV the., machineandl lshifting the beltv to different size pulleys thereby eitherstepping'it up or down. Ioovercomethis waste of time and llabor I haveprovided a means of .shifting the speed bygradual change from one speedto kanother by simply turning a crank handle. fr lVhen the gummedsurface of the paper tape has been moistened, a certain definite f timeshould elapse'before it is applied to the woodveneer, Vin order to givethe moisture, which has been spread.l on its outer surface, time topenetrate into the,v gum `material and suitably soften it. Sinc'e'therate of feed of theftape is necessarily exactly' l equal to that of theveneer it isevident that, unless special provision is made, the tapewill occupy less time in passing yfrom the water bath to the veneer ifthe veneer feed is fast than it will if the feed is slow, and that isa'. fact that the tapemust not be allowed therefore,v the moisturewillhave less time to penetrate and soften the gum. Also, `it

to stay moistlany longer than is absolutely necessary'to soften the gum,and therefore y it is not, a sufficient solution of the problem to causethe tape to pass throughv a per' manently long course because, though'such a course Vmight be sufcient when the speed is fast, it ywillprobablylbe much too long trol, lwhereby the length ofthe course lof thetape from the water` bath tothe veneer is substantially proportionatekto the speed when Athe speed is slow. I have therefore provided yameans, tied upjto the feedy con?,V

of feed of the veneer and therefore the elapsed time of exposure ofthemoist tape is substantially constant.

However,V it is also a well ltnown factethatx the atmosphericconditioncf the room has la sti'ongreifect on the' moist tape in that,if the air be dry or warm,'the moist tape should notibev exposed for aslong a time as when Vit isr cool or moist. Also `the kind of gum, theage of the tape, the kindof i tape, and many other variable conditionslmake it desirable to*{providef a different length of exposed moist tapeforthe same rates ofyfeed.y Since these` conditions only var-y slightlyvand require adjustment at comparatively long intervals I have provided aY.

Ll" y Vmeanswhereby the course traveled by the tape maybe-manuallyadjusted to suit the `particularconditions as above outlined.

Referring now to the drawings, it will be seen-thatdniy'inachineconiprises a frame p1., having a horizontal table 2,V adapted tosupport the veneer to be taped, and an arm 3,'

extending over the center of the table 2 and carrying the tapingapparatus on' aAv head 4. A feed roller Y5 is mounted below,and-eX-l`tends'up through the table 2 and is adapted to engage the lower side ofthe veneerpsheet and to causerit to travel onthe vtable and'underthetaping apparatus.` A pressure roller Glis'inountedlin the head 4 andengages the upper side'of the veneer'sheet and applies thelmo'ist tapethereto. The 'feed roller' 5 'is fo intermediate gears, or otherwise,from a.

i 5 rdriven by a 'shaft' 7, and-the pressurevroller 6 Vis driven by theshaft f 8. 'Both these shafts 7 and 8 arel driven, through `suitablevariable-speed drive vmechanism one forin of A which is illustratedherein and comprises the conev ulley9, drivenlby the belt 10 `from acomp einentaryf driving cone pulley 11, which rotates at a const-antspeed"- The belt I f1() is adapted to be placed in any position on Vthepulleys" 9 and V11 and therefore the peripheral speed of the"feedfroller 5 and the jii'ressure roller 6 may be changed shifting thebelt from one position toV another. The Iabove inethodof obtaining avariable speed from ay constant driveV is one form ofniany ksuchknowndrives, any one of which may be used in this `machine if they areadaptedj thereto. Y

1 In vthe form of spe-edV control, illustrated herein, I inount ahorizontal shaft 12 on the upper frame arm-3 and rotate it by means ofv-aipairof miter gears 113 and by'rthe hand wheel; 14 andthe crankliandlel.v A vertical shaft 16 is mounted at the rear ofthe 'machine andis driven by the shaft 12 by niejahs of the pair ofbevel gears 17. Ahorizontal screw-threaded'shaftlS is mounted edu'idi'stant from andparallel with the axes ofthe two cone pulleys 9 andll 'and is driven Ifrointhe vertical shaft 16 by aV pair of bevel gears r19. A Y y jparallel ywith' the shaft 18 (Fig. A belt shifting'carriage isinountedon the `rod 20 and `on the shaft 18 and has a nut 22 enguide rodw'20 ismounted gaging the threads of the said shaftlS.

the said carriage 21.v 'l

Thev belt 10 passesv through two holes 23 vvin handvvheel14, theshafts12, 16 and 18 are rotated and thecarriage 21' is shifted along the shaft18 and the-rod '20 and shifts the -beltf y10 on'v the complementary.cone pulleys Qand 11;

. `Referring particularly toy Fig. 4, it Will seen that'the roll of tape24`is mounted onvk an'arni 25 extending horizontally froinaverticalfraine26 attached to the head 4 on the end of the upper arin 3ofthe frame. The

hus, yby rotating the.

usual water bath 27 is mounted below the said arm and is provided withaser-ies of suitable guiderollers 28"and wetting rollers 29 mountedtherein and adapted to support aiidguide the paper tapetherethrough.

j A variable-course tape-guiding mechanism is provided and comprises a`vertical'screwthreaded shaft 30, mouiited'in the said ver'- tical frame26, and is driven by the abovedescribed horizontal control shaft 12thro-ugh the bevel gears 31. A nut 32 engages the'.

screwshaft (Fig. 3:) and is kept Vfrom turning therewith but is free vtoVtravel verticatlly thereon in the said fraine26.v A Vpiny l33e-passesout from the nut 32 and is provided with screw-threads and with a wingVnut 34. A vertical plate 35 is provided with Aa longitudinal'slot 36 andthe Wingnut 34 clain-psthe plate 35, in anyjadjusted position,

`to thenut 32. A guide roller 37 is' `mounted for onY one end of the*platel o.) and, is inline with the guide rollers 28 on the water bath,and

is in the central axis of theveii-eer'feed. vIt' to vbe applied to theveneer; therefore, as

the roller 37 is raised or'flowered, the length fof tape between thewater bath and the veneer isl Ylengtheiied Vor shortened vbysubstantially double .the amount of 'movement of thenut 32 in the frame2o. The apparatus is ar- 'feedfis increased the length'of exposed taperanged so Vthat as the speed of the veneer between the water bath andthe veneeris substantially proportionately increased.

Also, .it will be seen, that the actual length of yexposed moist tapebetween the water bath 27 and the veneer may be periodically adjustedloosening the wing nut 34 Y'on the pin l33 and sliding theV 'platef35'up or down over the said pin, and then clamping it thereto by'tightening the said wingrv nut t. y

34 again;` Also, in extreniecases, it'will beV seen thattheentire plate35 may be reversed from the pOsitioii, shown in the draw-ings,

bringingthe roller 137 yto its upper end, insteadof its lower end 'asshown, and vthereby permitting a4 much longer time to elapse be- I'tween the inoistening and! applying of the tape than would ber possiblewhen placed as shown, -such position being used when the vveneer isbeing fed through at a hightrate but Athe guniined tape reouires aneXtra long time to become suitably softenec. f

When it is desired to apply the tape to i theiedge of a v.sheet ofveneer the tapev 24 is led over a series of inclined adjustable rollerswhich divert it rfrom the central `line of Y the veneer feed( Figs. 1,2and 4). A bar 38 is removably and iadjustabl'y secured to the upper sideof the-table 2 by thumb-screws 39 vwhich pass through transverse slotsin the said bar 38 and vscrew into the said table 2,

thus permitting a limited transverse'adjust.- ment of the bar 38 on thetablek An arm 40 extends from the bar 38 and carries a vertical pin 4l,which is bent at right-angles at its end, and carries a horizontal guideroller vand carries a guide roller 46 thereon. The

pin 45 is clamped to the arm 44 by means of a thumb-screw 47 andtherefore the roller 46 may be adjusted in distance from the other pin41 and in verticalangle (Fig. 4). The tape 24 is therefore led from thewater bath 27 over the length adjusting'roller 37, thenV it is led in aninclined downward and rearward direction and is slightly twisted (Fig.4) and passes over the guide roller 42, which is setat an angle to thedirection of travel of the veneer, thence it is lled forward'andlinclined laterally (Fig. 2) and slightly twisted ig. 4) and passesunder the vertically inclined roller 46 and is thus displaced laterallyfrom the central line of the feed but is parallel thereto, and passesthence under the pressure roller V6, which applies it to the veneer.y A,

Thus it will be seen that the manuallyoperated control mechanismconnects the Variable-speed. drive mechanismrto the variable-coursetape-guiding mechanism in such a manner that when the operator of my ma.chine changes the speed of the veneer feed he also changes thelength ofthe exposed moist tape in acccordanceV with the changes in the speed ofthe veneer feed. The machine also guides the tape to Yone side of thecentral line of the feed and is therefore adapted to apply the tape tothe edge of single sheets of venecia, In case it is desired to tape theedges of two sheets together, then the bar 38 is removed, by unscrewingthe thumb screws 39, and the tape is led directly from the adjustingroller 37 to the pressure roller 6, along the center line of the feed ofthe machine.

It is evident that many variations may be made in tlie several parts ofthis machine without departing from the' principles involved therein,for instance, practically any of the various well known variable-speedmechanisms maybe substituted for the corresponding mechanism illustratedand described herein. Y

Having therefore described my invention,

what I claim is j l'. In a 'veneer taping machine, the combi- Anationwith a veneer feedmechanism; a4 lvariable-speed drive Vmechanism avariablecourse tape-guiding mechanism; and manually-operated rmeansconnecting said vari able-speed drive mechanism to said variablecoursetape-guiding mechanism, whereby the l length of exposed moist tape isincreasedfas the speed is increased to render the time of exposure ofthe moist tapesubstantiallyuniform.v .Y Y

2. In a veneer taping machine, the combination with a veneer feedmechanism; a variable-speed drive mechanism; a variable-- coursetape-guiding mechanism; adjustable means in said variable-coursetape-'guiding mechanism, whereby the length of the course son.,

may be ladjusted independent of saidvari- 7 able-course tape-guidingmechanism; andl manually-operated means connecting said variable-speeddrivemechanism to said variable-course tape-guiding mechanism wherebythe said adjusted lengthof exposed moist tape is increased as the speedis increased" 90 to render the time of exposurerof the moist tapesubstantially uniform.

3. In a veneer ytaping machine, the combiy nation with a'veneer kfeedmechanism; a tape-guidin g and lmoistening means'adapted to feed thetape in the central axis'v ofthe veneer feed; a guide roller mounted inthe central axis of the veneer feed andf having its axis lying in ahorizontal plane but at Vless than right-angles to the direction of theveneer feed and adapted to receivethe tape from the tape guiding meansandto divert it from the central axis to'an angular course; anda secondguide roller mounted toone side of said central axis of the veneen feedand adapted to receive the tape in its angular course and to divert itinto alaterj vally displaced but parallel ycourse to said central axisof veneer feed'.

4.v In a veneer taping machine, the combination with a veneer feedmechanism; a tape guiding and moisteningV means adapted to feed thetape. in the central axis of ,the

veneer feed; a horizontally-rotatably-adjustable guide roller mounted insaidV central axis ofy veneer feed and adapted to receivev the tape fromthetape guiding means and.

to divert it from the central axis to an angular course; and averticallyerotatably-adjustable guide roller mounted to one side of thesaid` central axis of the veneer feed and adapted toy receive the tapein its vangular course andto divert it into a laterallyolisplaced butparallell course to said central f axis of veneer feed'. l

HUGH G. GREENFIELD.

